Slide 1Plate Tectonics Slide 2 What is the Theory of Continental Drift? Slide 3 Alfred Wegner, 1915 The continents were once a super-continent called Pangea the continents…

Slide 1 Earth Science Section 17.2 – Seafloor Spreading Slide 2 Objectives Summarize the evidence that led to the discovery of seafloor spreading. Explain the significance…

Slide 1 17-2 Seafloor Spreading Objectives  Summarize the evidence that led to the discovery of seafloor spreading  Explain the significance of magnetic patterns on…

Multi-year time scale variations El Nino and La Nina are important phenomena Occur every ~2 to 7 years when typical ocean-atmosphere circulation breaks down During normal…

* Unit 4 The Dynamic Crust * A. The Earth in Cross Section There are 4 major zones that make up the Earth: A. : Outer, thinnest layer of the Earth. There are two types: 1.…

Chapter 17 Objectives Summarize the evidence that led to the discovery of seafloor spreading. Explain the significance of magnetic patterns on the seafloor. Explain the process…

1. 1Week 5Review of week 4ocontext of geologic description within basin analysisostratigraphy: differing stratigraphic units and their useomodern contributions to stratigraphyTopics…